Year	current US$
2001	50787202178.35262
2002	54362695711.36828
2003	69538461538.46155
2004	93968596324.02995
2005	122070878148.40028
2006	152433690946.22192
2007	186690265486.72568
2008	248808168822.32812
2009	201958883594.28183
2010	238328114363.5126
2011	315867937372.3622
2012	375513955071.47723
2013	392244520081.68823
2014	401366643975.4935
2015	361252552756.97754
2016	360626276378.4888
2017	384043567052.4166
2018	392863172226.0041
2019	404046289993.1927
2020	335237576582.70935